How to make Browser auto reload or refresh

Here is how to check if web page is connected in JavaScript: http://www.kirupa.com/html5/check_if_internet_connection_exists_in_javascript.htm. This is well explained and you should take a look.


//I added the location.reload() if connection fails.
function doesConnectionExist() {
var xhr = new XMLHttpRequest();
var file = "http://www.yoursite.com/somefile.png";
var randomNum = Math.round(Math.random() * 10000);

xhr.open('HEAD', file + "?rand=" + randomNum, false);

try
{
hr.send();

if (xhr.status >= 200 && xhr.status < 304)
{
return true;
}
else
{
return false;
location.reload();
}
}
catch (e)
{
return false;
}
}